Multiple choice What is NOT one of the purposes for which CO2 and Er:YAG lasers are traditionally used improving sun-damaged skin Hair removal reducing the appearance of acne scars improving moderate or mild rhytids Reveal answer Fill a bubble to check yourself B Correct answer Explanation CO2 and Er:YAG lasers are ablative lasers used for resurfacing and scar reduction. They are not used for hair removal, which requires different wavelengths and targets.